The Civil Public and Services Union, which represents around 10,000 lower paid civil servants, is to recommend acceptance of the new public service pay agreement.
The decision to recommend a yes vote was taken at a meeting of the CPSU Executive Committee.
A ballot will take place between 28 August and 15 September.
The union's main concerns as they entered the pay talks in May had included full pay restoration, the rollback of additional unpaid hours, lower pay scales for new entrants, the removal of the public service pension levy and the protection of existing pension benefits.
General Secretary Eoin Ronayne said the Executive's decision had been very difficult.
He noted that while the extension to the Lansdowne Road Agreement fails to secure the rollback of the additional unpaid hours imposed during the economic crisis, the deal did have some benefits.
He said progress had been made on improving pay scales to beyond pre-pay cut rates by the time the new deal expires.
Additional annual leave had been secured for longer serving staff, along with enhanced promotional opportunities.
In addition, the threshold for the pension levy had been increased from €28,750 to €34,500.
He said that even if members ballot in favour of the deal, the CPSU will continue to campaign on issues of concern.